func generateData() {
fmt.Printf("(launching mock dump0190 on localhost:%d; mlat=%v)\n", port, mlat)
ln, _ := net.Listen("tcp", fmt.Sprintf("localhost:%d", port))
outerLoop:
for {
conn, _ := ln.Accept()
fmt.Printf("(connection started)\n")
m := adsb.Msg{
Icao24: adsb.IcaoId("A81BD0"),
Callsign: "ABW123",
Type: "MSG",
Altitude: 12345,
GroundSpeed: 300,
Track: 315,
VerticalRate: 64,
Position: geo.Latlong{36.0, -122.0},
GeneratedTimestampUTC: time.Now().UTC(),
LoggedTimestampUTC: time.Now().UTC(),
}
// We need to prime the pump, and trick the msgbuffer
m.SubType = 3 // Get an entry in the sender table for our Icao, by proving we have pos data
conn.Write([]byte(fmt.Sprintf("%s\n", m.ToSBS1())))
m.SubType = 1 // Populate the sender table entry with a callsign (MSG,1 only)
conn.Write([]byte(fmt.Sprintf("%s\n", m.ToSBS1())))
m.SubType = 4 // Populate the sender table entry with velocity data (MSG,4 only)
conn.Write([]byte(fmt.Sprintf("%s\n", m.ToSBS1())))
m.SubType = 3 // All future messages are linear position updates (MSG,3 only)
for {
now := time.Now().UTC().Add(-1 * delay)
m.Position.Lat += 0.01
m.GeneratedTimestampUTC = now
m.LoggedTimestampUTC = now
if mlat {
m.Type = "MLAT"
}
if _, err := conn.Write([]byte(fmt.Sprintf("%s\n", m.ToSBS1()))); err != nil {
fmt.Printf("(connection ended)\n")
continue outerLoop
}
time.Sleep(time.Millisecond * 1000)
}
}
}
func addFr24ToAirspace(ctx context.Context, as *airspace.Airspace) {
fr, _ := fr24.NewFr24(urlfetch.Client(ctx))
if asFr24, err := fr.FetchAirspace(sfo.KAirports["KSFO"].Box(250, 250)); err != nil {
return
} else {
for k, ad := range asFr24.Aircraft {
// FIXME: This whole thing is a crock. Track down usage of fr24/icaoids and rewrite all of it
newk := string(k)
newk = "EE" + strings.TrimPrefix(newk, "EE") // Remove (if present), then add
ad.Airframe.Icao24 = newk
as.Aircraft[adsb.IcaoId(newk)] = ad
}
}
}
func (a Airspace) String() string {
str := ""
keys := []string{}
for k, _ := range a.Aircraft {
keys = append(keys, string(k))
}
sort.Strings(keys)
for _, k := range keys {
ac := a.Aircraft[adsb.IcaoId(k)]
str += fmt.Sprintf(" %8.8s/%-8.8s/%-6.6s (%s last:%6.1fs at %s/%s, %5d msgs) %5df, %3dk\n",
ac.Msg.Callsign, ac.Msg.Icao24, ac.Registration,
ac.Msg.DataSystem(),
time.Since(ac.Msg.GeneratedTimestampUTC).Seconds(),
ac.Source, ac.Msg.ReceiverName,
ac.NumMessagesSeen,
ac.Msg.Altitude, ac.Msg.GroundSpeed)
}
return str
}